In order to manage, use and conserve plants, we need to improve communication of useful information about them. For this, accurate identification using field guides is important. This book provides potential authors of field guides with an understanding of the issues and methods suitable for producing user-friendly guides which help to identify plants for the purposes of conservation, sustainable use, participatory monitoring or greater appreciation of biodiversity. The book draws on both scientific and participatory processes, supported by the experience of contributors from across the tropics. It presents a core process for producing a field guide, setting out key steps, options and techniques available to the authors of a guide and, through illustration, helps authors choose methods and media appropriate to their context.